377 lines
10 KiB
C
377 lines
10 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Mark Arigo
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <sys/types.h> /* off_t */
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#include "config.h"
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#include "cpu.h"
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#include "lcd.h"
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#include "kernel.h"
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#include "system.h"
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/* Display status */
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static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
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#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
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static bool is_lcd_enabled = true;
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#endif
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/* NOTE: the LCD is rotated 90 degrees */
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/* LCD command set for Samsung S6B33B2 */
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#define R_NOP 0x00
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#define R_OSCILLATION_MODE 0x02
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#define R_DRIVER_OUTPUT_MODE 0x10
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#define R_DCDC_SET 0x20
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#define R_BIAS_SET 0x22
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#define R_DCDC_CLOCK_DIV 0x24
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#define R_DCDC_AMP_ONOFF 0x26
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#define R_TEMP_COMPENSATION 0x28
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#define R_CONTRAST_CONTROL1 0x2a
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#define R_CONTRAST_CONTROL2 0x2b
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#define R_STANDBY_OFF 0x2c
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#define R_STANDBY_ON 0x2d
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#define R_DDRAM_BURST_OFF 0x2e
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#define R_DDRAM_BURST_ON 0x2f
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#define R_ADDRESSING_MODE 0x30
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#define R_ROW_VECTOR_MODE 0x32
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#define R_N_LINE_INVERSION 0x34
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#define R_FRAME_FREQ_CONTROL 0x36
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#define R_RED_PALETTE 0x38
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#define R_GREEN_PALETTE 0x3a
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#define R_BLUE_PALETTE 0x3c
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#define R_ENTRY_MODE 0x40
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#define R_X_ADDR_AREA 0x42
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#define R_Y_ADDR_AREA 0x43
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#define R_RAM_SKIP_AREA 0x45
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#define R_DISPLAY_OFF 0x50
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#define R_DISPLAY_ON 0x51
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#define R_SPEC_DISPLAY_PATTERN 0x53
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#define R_PARTIAL_DISPLAY_MODE 0x55
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#define R_PARTIAL_START_LINE 0x56
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#define R_PARTIAL_END_LINE 0x57
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#define R_AREA_SCROLL_MODE 0x59
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#define R_SCROLL_START_LINE 0x5a
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#define R_DATA_FORMAT_SELECT 0x60
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/* wait for LCD */
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static inline void lcd_wait_write(void)
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{
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while (LCD1_CONTROL & LCD1_BUSY_MASK);
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}
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/* send LCD data */
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static void lcd_send_data(unsigned data)
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{
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lcd_wait_write();
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LCD1_DATA = data >> 8;
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lcd_wait_write();
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LCD1_DATA = data & 0xff;
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}
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/* send LCD command */
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static void lcd_send_command(unsigned cmd)
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{
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lcd_wait_write();
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LCD1_CMD = cmd;
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}
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/* LCD init */
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void lcd_init_device(void)
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{
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#if 0
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/* This is the init sequence from the yh820 OF bootloader */
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unsigned long tmp;
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DEV_INIT1 &= ~0x3000;
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tmp = DEV_INIT1;
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DEV_INIT1 = tmp;
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DEV_INIT2 &= ~0x400;
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LCD1_CONTROL &= ~0x4;
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udelay(15);
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LCD1_CONTROL |= 0x4;
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LCD1_CONTROL = 0x680;
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LCD1_CONTROL = 0x684;
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LCD1_CONTROL |= 0x1;
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udelay(200);
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lcd_send_command(R_STANDBY_OFF);
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udelay(100000);
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lcd_send_command(R_DISPLAY_OFF);
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udelay(10000);
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lcd_send_command(R_OSCILLATION_MODE);
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lcd_send_command(0x01);
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udelay(30000);
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lcd_send_command(R_DCDC_SET);
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lcd_send_command(0x01);
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udelay(30000);
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lcd_send_command(R_DCDC_AMP_ONOFF);
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lcd_send_command(0x01);
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udelay(30000);
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lcd_send_command(R_DCDC_AMP_ONOFF);
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lcd_send_command(0x09);
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udelay(30000);
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lcd_send_command(R_DCDC_AMP_ONOFF);
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lcd_send_command(0x0b);
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udelay(30000);
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lcd_send_command(R_DCDC_AMP_ONOFF);
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lcd_send_command(0x0f);
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udelay(30000);
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lcd_send_command(R_DCDC_CLOCK_DIV);
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lcd_send_command(0x03);
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udelay(10000);
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lcd_send_command(R_CONTRAST_CONTROL1);
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lcd_send_command(0x89);
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udelay(10000);
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lcd_send_command(R_TEMP_COMPENSATION);
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lcd_send_command(0x01);
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udelay(10000);
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lcd_send_command(R_ADDRESSING_MODE);
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lcd_send_command(0x19);
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udelay(10000);
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lcd_send_command(R_ROW_VECTOR_MODE);
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lcd_send_command(0x00);
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udelay(10000);
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lcd_send_command(R_N_LINE_INVERSION);
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lcd_send_command(0x8b);
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udelay(10000);
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lcd_send_command(R_ENTRY_MODE);
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lcd_send_command(0x01);
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lcd_send_command(R_DRIVER_OUTPUT_MODE);
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lcd_send_command(0x34);
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udelay(10000);
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lcd_send_command(R_X_ADDR_AREA); /* vertical dimensions */
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lcd_send_command(0x00); /* y1 */
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lcd_send_command(LCD_HEIGHT - 1); /* y2 */
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lcd_send_command(R_Y_ADDR_AREA); /* horizontal dimensions */
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lcd_send_command(0x04); /* x1 + 4 */
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lcd_send_command(LCD_WIDTH - 1 + 4); /* x2 + 4 */
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udelay(100);
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lcd_send_command(R_BIAS_SET);
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lcd_send_command(0x01);
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lcd_send_command(R_DDRAM_BURST_OFF);
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udelay(100);
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lcd_send_command(R_DISPLAY_ON);
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udelay(30000);
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#endif
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}
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/*** hardware configuration ***/
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int lcd_default_contrast(void)
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{
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return DEFAULT_CONTRAST_SETTING;
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}
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void lcd_set_contrast(int val)
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{
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lcd_send_command(R_CONTRAST_CONTROL1);
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lcd_send_command(val);
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}
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void lcd_set_invert_display(bool yesno)
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{
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lcd_send_command(R_SPEC_DISPLAY_PATTERN);
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lcd_send_command(yesno);
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}
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#if defined(HAVE_LCD_ENABLE)
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void lcd_enable(bool yesno)
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{
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if (yesno == is_lcd_enabled)
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return;
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if ((is_lcd_enabled = yesno))
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{
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lcd_send_command(R_STANDBY_OFF);
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lcd_send_command(R_DISPLAY_ON);
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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else
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{
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lcd_send_command(R_STANDBY_ON);
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}
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}
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#endif
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#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
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bool lcd_active(void)
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{
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return is_lcd_enabled;
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}
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#endif
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#ifdef HAVE_LCD_FLIP
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/* turn the display upside down (call lcd_update() afterwards) */
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/* Note: since the lcd is rotated, this will flip horiz instead of vert */
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void lcd_set_flip(bool yesno)
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{
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lcd_send_command(R_DRIVER_OUTPUT_MODE);
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lcd_send_command(yesno ? 0x30 : 0x34);
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}
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#endif
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/*** update functions ***/
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void lcd_yuv_set_options(unsigned options)
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{
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lcd_yuv_options = options;
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}
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/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
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extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
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int width,
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int stride);
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extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
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int width,
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int stride,
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int x_screen, /* To align dither pattern */
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int y_screen);
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/* Performance function to blit a YUV bitmap directly to the LCD */
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void lcd_blit_yuv(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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unsigned char const * yuv_src[3];
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off_t z;
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/* Sorry, but width and height must be >= 2 or else */
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width &= ~1;
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height >>= 1;
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z = stride*src_y;
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yuv_src[0] = src[0] + z + src_x;
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yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
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yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
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lcd_send_command(R_ENTRY_MODE);
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lcd_send_command(0x03);
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lcd_send_command(R_Y_ADDR_AREA);
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lcd_send_command(x + 4);
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lcd_send_command(x + width - 1 + 4);
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if (lcd_yuv_options & LCD_YUV_DITHER)
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{
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do
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{
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lcd_send_command(R_X_ADDR_AREA);
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lcd_send_command(y);
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lcd_send_command(y + 1);
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lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
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yuv_src[0] += stride << 1; /* Skip down two luma lines */
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yuv_src[1] += stride >> 1; /* Skip down one chroma line */
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yuv_src[2] += stride >> 1;
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y += 2;
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}
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while (--height > 0);
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}
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else
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{
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do
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{
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lcd_send_command(R_X_ADDR_AREA);
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lcd_send_command(y);
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lcd_send_command(y + 1);
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lcd_write_yuv420_lines(yuv_src, width, stride);
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yuv_src[0] += stride << 1; /* Skip down two luma lines */
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yuv_src[1] += stride >> 1; /* Skip down one chroma line */
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yuv_src[2] += stride >> 1;
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y += 2;
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}
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while (--height > 0);
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}
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}
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/* Update the display.
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This must be called after all other LCD functions that change the display. */
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void lcd_update(void)
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{
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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/* Update a fraction of the display. */
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void lcd_update_rect(int x, int y, int width, int height)
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{
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const fb_data *addr;
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if (x + width >= LCD_WIDTH)
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width = LCD_WIDTH - x;
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if (y + height >= LCD_HEIGHT)
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height = LCD_HEIGHT - y;
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if ((width <= 0) || (height <= 0))
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return; /* Nothing left to do. */
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addr = FBADDR(x,y);
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if (width <= 1) {
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lcd_send_command(R_ENTRY_MODE); /* The X end address must be larger */
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lcd_send_command(0x03); /* that the X start address, so we */
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lcd_send_command(R_Y_ADDR_AREA); /* switch to vertical mode for */
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lcd_send_command(x + 4); /* single column updates and set */
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lcd_send_command(x + 1 + 4); /* the window width to 2 */
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} else {
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lcd_send_command(R_ENTRY_MODE);
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lcd_send_command(0x01);
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lcd_send_command(R_Y_ADDR_AREA);
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lcd_send_command(x + 4);
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lcd_send_command(x + width - 1 + 4);
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}
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lcd_send_command(R_X_ADDR_AREA);
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lcd_send_command(y);
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lcd_send_command(y + height - 1);
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do {
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int w = width;
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do {
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lcd_send_data(*addr++);
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} while (--w > 0);
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addr += LCD_WIDTH - width;
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} while (--height > 0);
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}
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